Mohamed Sobhi | Cario - Academia.edu (original) (raw)

Papers by Mohamed Sobhi

Research paper thumbnail of Enhancing the anticorrosion performance of mild steel in sulfuric acid using synthetic non-ionic surfactants: practical and theoretical studies

Green Chemistry Letters and Reviews, 2021

ABSTRACT The anticorrosion potency of Sabic mild steel (MS) in 0.5 M H2SO4 solution was enhanced ... more ABSTRACT The anticorrosion potency of Sabic mild steel (MS) in 0.5 M H2SO4 solution was enhanced by three synthetic non-ionic surfactants (NI Surf.) containing pyridine and pyrimidine derivatives. These compounds are safe, environmentally friendly, and harmless to human health. Chemical and electrochemical measurements were used to compute the corrosion parameters. The anticorrosion efficacy increases with increasing the concentration of NI Surf. and with lowering temperature, surface and interfacial tension, and critical micelle concentration. The effectiveness of anticorrosion is interpreted due to the spontaneous horizontal adsorption on the surface of MS by the existence of some active centers that facilitate the adsorption. The adsorption process obeys Temkin isotherm. Potentiodynamic polarization elucidated that the synthetic NI Surf. acted as mixed-type inhibitors. Some surface properties were determined and confirm the anticorrosive effect of these molecules. Quantum chemical parameters as reactivity descriptors were carried out. It should be noted that the results obtained from computational calculations of the specifications are in full agreement with the experimental observations. There is good compatibility between the anticorrosion efficiency obtained from various techniques and surface properties and quantum chemical calculation. GRAPHICAL ABSTRACT

Research paper thumbnail of Facile Synthesis of Osage-Orange like TiO 2 Mesospheres using Titanate Nanotubes

RESUMO A sociedade da informação demanda sujeitos que sejam formados para um mundo pautado na pro... more RESUMO A sociedade da informação demanda sujeitos que sejam formados para um mundo pautado na produção e disseminação de conhecimento, que saibam fazer usos reflexivos das mídias. Essa premissa é defendida por instituições como a Unesco que relaciona o domínio de habilidades de usos técnicos e críticos das mídias para que haja inserção social. Nesta perspectiva o presente artigo discutir a relação de jovens estudantes da Região do Baixo São Francisco, em Sergipe, com as mídias enquanto elementos da formação pessoal e profissional numa sociedade pautada pela mediação das TDIC. Para tanto é feita uma análise de respostas dadas a 48 questionários compostos por 10 questões fechadas, respondidas por Escala Likert e baseadas nos aspectos defendidos pela Unesco como basilares para a formação na Sociedade da Informação. Esses questionários foram aplicados junto a jovens estudantes do ensino médio profissionalizante da Rede Pública de Sergipe e moradores da região do Baixo São Francisco. As respostas mostram que esses jovens têm acesso às mídias e as utilizam principalmente para atividades de entretenimento, sem compreender os aspectos críticos e reflexivos inerentes à mídia e nem o papel dela enquanto elemento de sociedades democráticas.

Research paper thumbnail of Air Flow Patterns and Thermal Comfort in a Room with Diverse Heating Systems

AIAA Scitech 2020 Forum, 2020

Research paper thumbnail of 大型高速YRK2500—2／1430型绕线式异步电动机的研制

讨论了大型高速YRK2500—2／1430型绕线式三相异步电动机的设计、制造、检验整个过程。主要介绍了该电机定、转子结构、转子铁心加键结构、三瓣式转子引线结构、电机通风冷却系统、推力轴瓦结构的设... more 讨论了大型高速YRK2500—2／1430型绕线式三相异步电动机的设计、制造、检验整个过程。主要介绍了该电机定、转子结构、转子铁心加键结构、三瓣式转子引线结构、电机通风冷却系统、推力轴瓦结构的设计理念和制造过程中遇到的问题和解决方法，为今后类似结构的设计打下了基础。

Research paper thumbnail of The taxonomy, life history and evolution of Puccinia arachidis Speg

Research paper thumbnail of Microstructure and Impact Properties of Harmonic-Structured High Entropy Alloy

Research paper thumbnail of CFD Simulation of Thermal and Energy Performance for a Display Cabinet Refrigerator Containing a Phase Change Material (PCM)

AIAA Propulsion and Energy 2020 Forum, 2020

Research paper thumbnail of Center clustering network improves piglet counting under occlusion

Computers and Electronics in Agriculture, 2021

Research paper thumbnail of Methylene Blue sorption by the chemically modified Ocimum basilicum leaves powder

DESALINATION AND WATER TREATMENT, 2021

Chemically modified Ocimum basilicum leaves powder (CMOBLP) adsorbent was used for the eliminatio... more Chemically modified Ocimum basilicum leaves powder (CMOBLP) adsorbent was used for the elimination of Methylene Blue (MB) from aqueous solutions. The morphology of CMOBLP was identified by microscopy of scanning electron and Fourier transform infrared technics. The porosity and surface area of the prepared CMOBLP have also been determined by applying a Brunauer-Emmett-Teller (BET) surface analyzer. The influences of MB primary concentration, temperature, sorption time, and solution pH were studied. The parameters of kinetics were evaluated, and the obtained results suggest that MB sorption by CMOBLP follows the model of the second-order. Thermodynamic outcomes pointed to that the MB sorption by CMOBLP is exothermic and spontaneous. Isotherm models of Langmuir, Freundlich, and Temkin were applied, and the experimental data were fitted well with the model of Langmuir, proposing monolayer sorption. The present study strongly reveals that CMOBLP is a very effective adsorbent. The sorption capacities of 714.29, 666.67, 625.00, and 555.56 mg/g were obtained at 20°C, 30°C, 40°C, and 50°C, respectively.

Research paper thumbnail of Wendy Brown. In the Ruins of Neoliberalism: The Rise of Antidemocratic Politics in the West. New York: Columbia University Press, 2019. Pp. 264. $75.00 (cloth)

American Political Thought, 2020

Research paper thumbnail of Possible Mechanisms of Naphthalene Toxicology: Concerning Inherited G6PD Deficiency

Journal of Complementary Medicine & Alternative Healthcare, Aug 14, 2018

Research paper thumbnail of The relation between serum bone morphogenetic protein-7 and severity of enthesitis in psoriatic arthritis

Egyptian Rheumatology and Rehabilitation, Jul 1, 2013

Research paper thumbnail of Acceleration of Ammonium Phosphate Hydrolysis Process via TiO2 Microspheres as A Catalyst for Hydrogen Production

Nanoscale Advances, 2020

Titania microspheres assess as an adequate material with low cost, and ease attainable pathways, ... more Titania microspheres assess as an adequate material with low cost, and ease attainable pathways, which can utilize as photocatalytic H2 production to solve energy crisis. Spherical porous titanium dioxide materials,...

Research paper thumbnail of Sequential peeling as a monotherapy for treatment of milder forms of acne vulgaris

Journal of Cosmetic Dermatology, 2019

Research paper thumbnail of The relation between serum bone morphogenetic protein-7 and severity of enthesitis in psoriatic arthritis

Egyptian Rheumatology and Rehabilitation, Jul 1, 2013

Research paper thumbnail of Some Polysorbate Compounds as Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid

JOURNAL OF ADVANCES IN CHEMISTRY, 2009

Some commercial non-ionic surfactants polysorbate, namely, polysorbate 80, polysorbate 40 and pol... more Some commercial non-ionic surfactants polysorbate, namely, polysorbate 80, polysorbate 40 and polysorbate 20, were tested as inhibitors for corrosion of C-steel in 2.0M HCl solution using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy techniques. It was found that all the three used compounds act as inhibitors for acid corrosion of C-steel. The inhibition efficiencies obtained by the three techniques were almost the same, and increase with increasing the hydrocarbon chain length and the surfactant concentration. The polarization studies show that these compounds act as mixed inhibitors. The inhibition action of these surfactants can be explained by their ability to adsorb on the metal surface making a barrier to mass and charge transfer. It was found that the adsorption of these surfactants follows Langmuir adsorption isotherm. The negative values of adsorption free energy indicating that the adsorption process is spontaneous and increases, fo...

Research paper thumbnail of Deep Learning Based Assessment of Laying Hen Feather Conditions Using Color and Thermal Images

2nd Asian Conference on Precision Livestock Farming (ACPLF2020), Oct 20, 2020

Research paper thumbnail of Factors Affecting Difference between EGW and AGW in Liver Transplantation

The Egyptian Journal of Hospital Medicine, 2018

Background: An accurate preoperative estimate of the graft weight and remnant liver volume is vit... more Background: An accurate preoperative estimate of the graft weight and remnant liver volume is vital to avoid small-for-size syndrome(SFSS) in the recipient and ensure donor safety after Living donor liver transplantation (LDLT). CT has been widely used as a method for the preoperative volumetric assessment of the liver transplantation.The graft size as measured from preoperative imaging which is often different from the actual weight of the liver graft as obtained by the donor hepatectomy. The difference between preoperative volumetry and Actual graft weight (AGW) was graded into minimal difference (≤15%) and big difference (>15%). Aim of The Work: This study was conducted to assess different preoperative factors that might affect the difference between estimated graft weight and actual graft weight in liver transplantation. Patients And Methods: This single center retrospective study was conducted on 86 cases who have been subjected to donation for liver transplantation in Ain S...

Research paper thumbnail of Penerapan E-CR Pada Pengembangan Prototipe Data Center (Studi Kasus: Unit Pelayanan Teknis Teknologi Informasi Dan Komunikasi Universitas Pendidikan Ganesha)

Jurnal Nasional Pendidikan Teknik Informatika (JANAPATI), 2018

Interoperability is a component that contains information systems integration. It’s provide an in... more Interoperability is a component that contains information systems integration. It’s provide an interfaces from multiple data sources to support data and information integrity between various information systems. This study aims: (1) Creating the design and implementation of Data Center System to support data integration by implementing ETL Process, cryptopost, and rest service. (2) Present a prototype Data Center review to support data integrase by implementing ETL Process, cryptopost, and rest service. This research is expected to provide solution of data integration model between information system running on HTTP protocol. The integration model uses synchronous and asychronous schemes. This type of research is research and development (Research and Development) with Agile SCRUM Framework research model. For the testing process, two (2) test process stages are performed: (1) whitebox and (2) blackbox testing.

Research paper thumbnail of Possible Mechanisms of Naphthalene Toxicology: Concerning Inherited G6PD Deficiency

Journal of Complementary Medicine & Alternative Healthcare, Aug 14, 2018

Possible mechanisms of naphthalene toxiclogy G6PD reduces nicotinamide adenine dinucleotide phosp... more Possible mechanisms of naphthalene toxiclogy G6PD reduces nicotinamide adenine dinucleotide phosphate (NADP +) to NADPH during oxidizing glucose-6-phosphate (G6P) [11], that involves in the biosynthesis of fatty acids or Abstract Naphthalene, a main ingredient in the traditional mouthballs is reported to cause various health problems, including hemolytic anemia, diarrhea, some neurological diseases and even cancer. This article aims to depict possible mechanisms of naphthalene-induced symptoms and diseases in human and other animals. Naphthalene may act through induction of oxidative stress and inflammatory pathways along with the alterations of some important cellular biochemicals such as gamma amino butyric acid, hemoglobin, glutathione and malondialdehyde. Sufficient measures should be taken to naphthalene exposure or consumption of naphthalenated products.

Research paper thumbnail of Enhancing the anticorrosion performance of mild steel in sulfuric acid using synthetic non-ionic surfactants: practical and theoretical studies

Green Chemistry Letters and Reviews, 2021

ABSTRACT The anticorrosion potency of Sabic mild steel (MS) in 0.5 M H2SO4 solution was enhanced ... more ABSTRACT The anticorrosion potency of Sabic mild steel (MS) in 0.5 M H2SO4 solution was enhanced by three synthetic non-ionic surfactants (NI Surf.) containing pyridine and pyrimidine derivatives. These compounds are safe, environmentally friendly, and harmless to human health. Chemical and electrochemical measurements were used to compute the corrosion parameters. The anticorrosion efficacy increases with increasing the concentration of NI Surf. and with lowering temperature, surface and interfacial tension, and critical micelle concentration. The effectiveness of anticorrosion is interpreted due to the spontaneous horizontal adsorption on the surface of MS by the existence of some active centers that facilitate the adsorption. The adsorption process obeys Temkin isotherm. Potentiodynamic polarization elucidated that the synthetic NI Surf. acted as mixed-type inhibitors. Some surface properties were determined and confirm the anticorrosive effect of these molecules. Quantum chemical parameters as reactivity descriptors were carried out. It should be noted that the results obtained from computational calculations of the specifications are in full agreement with the experimental observations. There is good compatibility between the anticorrosion efficiency obtained from various techniques and surface properties and quantum chemical calculation. GRAPHICAL ABSTRACT

Research paper thumbnail of Facile Synthesis of Osage-Orange like TiO 2 Mesospheres using Titanate Nanotubes

RESUMO A sociedade da informação demanda sujeitos que sejam formados para um mundo pautado na pro... more RESUMO A sociedade da informação demanda sujeitos que sejam formados para um mundo pautado na produção e disseminação de conhecimento, que saibam fazer usos reflexivos das mídias. Essa premissa é defendida por instituições como a Unesco que relaciona o domínio de habilidades de usos técnicos e críticos das mídias para que haja inserção social. Nesta perspectiva o presente artigo discutir a relação de jovens estudantes da Região do Baixo São Francisco, em Sergipe, com as mídias enquanto elementos da formação pessoal e profissional numa sociedade pautada pela mediação das TDIC. Para tanto é feita uma análise de respostas dadas a 48 questionários compostos por 10 questões fechadas, respondidas por Escala Likert e baseadas nos aspectos defendidos pela Unesco como basilares para a formação na Sociedade da Informação. Esses questionários foram aplicados junto a jovens estudantes do ensino médio profissionalizante da Rede Pública de Sergipe e moradores da região do Baixo São Francisco. As respostas mostram que esses jovens têm acesso às mídias e as utilizam principalmente para atividades de entretenimento, sem compreender os aspectos críticos e reflexivos inerentes à mídia e nem o papel dela enquanto elemento de sociedades democráticas.

Research paper thumbnail of Air Flow Patterns and Thermal Comfort in a Room with Diverse Heating Systems

AIAA Scitech 2020 Forum, 2020

Research paper thumbnail of 大型高速YRK2500—2／1430型绕线式异步电动机的研制

讨论了大型高速YRK2500—2／1430型绕线式三相异步电动机的设计、制造、检验整个过程。主要介绍了该电机定、转子结构、转子铁心加键结构、三瓣式转子引线结构、电机通风冷却系统、推力轴瓦结构的设... more 讨论了大型高速YRK2500—2／1430型绕线式三相异步电动机的设计、制造、检验整个过程。主要介绍了该电机定、转子结构、转子铁心加键结构、三瓣式转子引线结构、电机通风冷却系统、推力轴瓦结构的设计理念和制造过程中遇到的问题和解决方法，为今后类似结构的设计打下了基础。

Research paper thumbnail of The taxonomy, life history and evolution of Puccinia arachidis Speg

Research paper thumbnail of Microstructure and Impact Properties of Harmonic-Structured High Entropy Alloy

Research paper thumbnail of CFD Simulation of Thermal and Energy Performance for a Display Cabinet Refrigerator Containing a Phase Change Material (PCM)

AIAA Propulsion and Energy 2020 Forum, 2020

Research paper thumbnail of Center clustering network improves piglet counting under occlusion

Computers and Electronics in Agriculture, 2021

Research paper thumbnail of Methylene Blue sorption by the chemically modified Ocimum basilicum leaves powder

DESALINATION AND WATER TREATMENT, 2021

Chemically modified Ocimum basilicum leaves powder (CMOBLP) adsorbent was used for the eliminatio... more Chemically modified Ocimum basilicum leaves powder (CMOBLP) adsorbent was used for the elimination of Methylene Blue (MB) from aqueous solutions. The morphology of CMOBLP was identified by microscopy of scanning electron and Fourier transform infrared technics. The porosity and surface area of the prepared CMOBLP have also been determined by applying a Brunauer-Emmett-Teller (BET) surface analyzer. The influences of MB primary concentration, temperature, sorption time, and solution pH were studied. The parameters of kinetics were evaluated, and the obtained results suggest that MB sorption by CMOBLP follows the model of the second-order. Thermodynamic outcomes pointed to that the MB sorption by CMOBLP is exothermic and spontaneous. Isotherm models of Langmuir, Freundlich, and Temkin were applied, and the experimental data were fitted well with the model of Langmuir, proposing monolayer sorption. The present study strongly reveals that CMOBLP is a very effective adsorbent. The sorption capacities of 714.29, 666.67, 625.00, and 555.56 mg/g were obtained at 20°C, 30°C, 40°C, and 50°C, respectively.

Research paper thumbnail of Wendy Brown. In the Ruins of Neoliberalism: The Rise of Antidemocratic Politics in the West. New York: Columbia University Press, 2019. Pp. 264. $75.00 (cloth)

American Political Thought, 2020

Research paper thumbnail of Possible Mechanisms of Naphthalene Toxicology: Concerning Inherited G6PD Deficiency

Journal of Complementary Medicine & Alternative Healthcare, Aug 14, 2018

Research paper thumbnail of The relation between serum bone morphogenetic protein-7 and severity of enthesitis in psoriatic arthritis

Egyptian Rheumatology and Rehabilitation, Jul 1, 2013

Research paper thumbnail of Acceleration of Ammonium Phosphate Hydrolysis Process via TiO2 Microspheres as A Catalyst for Hydrogen Production

Nanoscale Advances, 2020

Titania microspheres assess as an adequate material with low cost, and ease attainable pathways, ... more Titania microspheres assess as an adequate material with low cost, and ease attainable pathways, which can utilize as photocatalytic H2 production to solve energy crisis. Spherical porous titanium dioxide materials,...

Research paper thumbnail of Sequential peeling as a monotherapy for treatment of milder forms of acne vulgaris

Journal of Cosmetic Dermatology, 2019

Research paper thumbnail of The relation between serum bone morphogenetic protein-7 and severity of enthesitis in psoriatic arthritis

Egyptian Rheumatology and Rehabilitation, Jul 1, 2013

Research paper thumbnail of Some Polysorbate Compounds as Corrosion Inhibitors for Carbon Steel in Hydrochloric Acid

JOURNAL OF ADVANCES IN CHEMISTRY, 2009

Some commercial non-ionic surfactants polysorbate, namely, polysorbate 80, polysorbate 40 and pol... more Some commercial non-ionic surfactants polysorbate, namely, polysorbate 80, polysorbate 40 and polysorbate 20, were tested as inhibitors for corrosion of C-steel in 2.0M HCl solution using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy techniques. It was found that all the three used compounds act as inhibitors for acid corrosion of C-steel. The inhibition efficiencies obtained by the three techniques were almost the same, and increase with increasing the hydrocarbon chain length and the surfactant concentration. The polarization studies show that these compounds act as mixed inhibitors. The inhibition action of these surfactants can be explained by their ability to adsorb on the metal surface making a barrier to mass and charge transfer. It was found that the adsorption of these surfactants follows Langmuir adsorption isotherm. The negative values of adsorption free energy indicating that the adsorption process is spontaneous and increases, fo...

Research paper thumbnail of Deep Learning Based Assessment of Laying Hen Feather Conditions Using Color and Thermal Images

2nd Asian Conference on Precision Livestock Farming (ACPLF2020), Oct 20, 2020

Research paper thumbnail of Factors Affecting Difference between EGW and AGW in Liver Transplantation

The Egyptian Journal of Hospital Medicine, 2018

Background: An accurate preoperative estimate of the graft weight and remnant liver volume is vit... more Background: An accurate preoperative estimate of the graft weight and remnant liver volume is vital to avoid small-for-size syndrome(SFSS) in the recipient and ensure donor safety after Living donor liver transplantation (LDLT). CT has been widely used as a method for the preoperative volumetric assessment of the liver transplantation.The graft size as measured from preoperative imaging which is often different from the actual weight of the liver graft as obtained by the donor hepatectomy. The difference between preoperative volumetry and Actual graft weight (AGW) was graded into minimal difference (≤15%) and big difference (>15%). Aim of The Work: This study was conducted to assess different preoperative factors that might affect the difference between estimated graft weight and actual graft weight in liver transplantation. Patients And Methods: This single center retrospective study was conducted on 86 cases who have been subjected to donation for liver transplantation in Ain S...

Research paper thumbnail of Penerapan E-CR Pada Pengembangan Prototipe Data Center (Studi Kasus: Unit Pelayanan Teknis Teknologi Informasi Dan Komunikasi Universitas Pendidikan Ganesha)

Jurnal Nasional Pendidikan Teknik Informatika (JANAPATI), 2018

Interoperability is a component that contains information systems integration. It’s provide an in... more Interoperability is a component that contains information systems integration. It’s provide an interfaces from multiple data sources to support data and information integrity between various information systems. This study aims: (1) Creating the design and implementation of Data Center System to support data integration by implementing ETL Process, cryptopost, and rest service. (2) Present a prototype Data Center review to support data integrase by implementing ETL Process, cryptopost, and rest service. This research is expected to provide solution of data integration model between information system running on HTTP protocol. The integration model uses synchronous and asychronous schemes. This type of research is research and development (Research and Development) with Agile SCRUM Framework research model. For the testing process, two (2) test process stages are performed: (1) whitebox and (2) blackbox testing.

Research paper thumbnail of Possible Mechanisms of Naphthalene Toxicology: Concerning Inherited G6PD Deficiency

Journal of Complementary Medicine & Alternative Healthcare, Aug 14, 2018

Possible mechanisms of naphthalene toxiclogy G6PD reduces nicotinamide adenine dinucleotide phosp... more Possible mechanisms of naphthalene toxiclogy G6PD reduces nicotinamide adenine dinucleotide phosphate (NADP +) to NADPH during oxidizing glucose-6-phosphate (G6P) [11], that involves in the biosynthesis of fatty acids or Abstract Naphthalene, a main ingredient in the traditional mouthballs is reported to cause various health problems, including hemolytic anemia, diarrhea, some neurological diseases and even cancer. This article aims to depict possible mechanisms of naphthalene-induced symptoms and diseases in human and other animals. Naphthalene may act through induction of oxidative stress and inflammatory pathways along with the alterations of some important cellular biochemicals such as gamma amino butyric acid, hemoglobin, glutathione and malondialdehyde. Sufficient measures should be taken to naphthalene exposure or consumption of naphthalenated products.